Here are six nice glass insulators from Australia as follows -- actual postage is additional:

CD 420 in aqua -- $8.00

CD 422 in clear -- $8.00

CD 422 in aqua -- $5.00

CD 121 in steel (interesting mold) -- $8.00

CD 121 in sage -- $5.00

CD 121 in aqua -- $5.00

Or take the set of six for $30